And clare nelsoh



F. PI REED AND C. NELSON.

DRIER. APPLICATION FILED IIIAII 30, I92I.

RENEWED lULY 26.1922.

,Wyo n @ou I @CII /ML y@ @o D il O E O E am M I E@ mi@ UO D D@ E D@ E vn I n In MIM. am L @x 3.., I I 1;

-F. REED AND C. NELSON.

DRIER.

APPLICATION FILED MAHc 30. 192|. RENEWED JULY 26, 1922. Miy. y Meme@ @QL 31.7, 1922 3 SHEETS-SHEET 2.

j if I @49% f ,fi-

FREDERIC PAYSN REED, OF MST ORANGE, NEW JERSEY, AND CLARE NELSON, F

NEVJ YORK, ASSIGNORS, BY MESNE ASSIGNMENTS, TO CHARLES C.

DRIER.'

Application filed March 30, 3.9M, Serial No. 456,857.

To all whom 'it may concern:

Be it known thatwe, FREDERIC PAYsoN Renn and Chinn NnrisoN, both citizens of the United States, whose residences and postoilice addresses are 33S Springdale Avenue, county of Essex, East-Orange, New Jersey, and l5 South Elliottl Street, Brooklyn, New York, respectively, have inventedcertain new and useful improvements in Driers; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains t make and use the Uur invention is an improvement in t riers, and relates to that type of drier forming the siibjectrnatter ot application No. sleffl, tiled lieceinber 3l, 1920, wherein a l ing is provided, havingmeans for heating the saine, and having a torarninous support for the web, moving with the web through the casing', and holding the web in a predetermined relation with respect to the heating means.

lilith this type of heater, and with other types now in use, the opposite Jfaces of the web are subjected in alternation to ay rela tively high tenn'ierature, which. vaporizes the moisture. and this Vvapor is condensed on the tace of the web remote from the source ot' heat, and on those portions of the web beyond suon source. Thus the web yduring,r its tra-vel is subjected to periods of intense dry-- ingr, alternating' with periods of cooling` and es rccoinlensation ot vapor, and consequent rewettingr ot the weh, conditions which obviously do not conduce to uniform trying and perfect curing' oiT the web.

.-in object et the present invenion is to provide a drier, by means of which the weh niay he dried in air of a substantially unitorin temperature and dryness` without Les :ibi-unt and violent variat i iereby to ohtain a uniform drying an clung' ot the web at relatively low teur; res,

fr tur-ther lent is to provide means in connection .5v rh the drier for rimini/iupr the `vapor formed. to 'nevcnt recondensation on 'the cooler pos-n.1 `-oi'- the web, and i'or preheating the air admitted to the drier by means oi such vapor. nother ohieet is to provi,f e a, heater unit so mnstructed and arranged that .both laces Renewed July 2S, 1922. Serial No. 577,736.

of the web may be simultaneously subjected to a. dryingact-ion, by means of air, While the vapor' laden air is continuously 'withdrawn from the heater.

Another object is to provide an enclosing casing' for a battery of such heater units, so arranged that the vapors evolved in the drying of the web may be continuously fw-itli-` drawn from the enclosing casing, and from the casinos or' the heater units,.and 'iireshair supplied to the said casings, such 'air being dried and preheated by the vapor withdrawn, 'but out of contact therewith.

In kthe drawings: Figure l is a vertical section through a Gti battery ol". the heaters and their enclosing" elsing,

Figures Q, 3, 4 and 5 are sections on the lines 2 2, 3 3, 4*-4 and 5 5, respectively, of Figure l, i

Figure (3 is an enlarged detail section at one end of one of the units,

Figure 7 is a section on the line 7-7 of Figure S,

Figure 8 is a horizontal section at one end ot' one of the unit-s.

ln the construction forming the `subjectmatter of application No. 434,231, tiled December 3l, i920, a form of heater is shown, comprising` an open top casing and provided with heating means, and with means for guiding the web ot' paper in the open top, so that the under side of the web is subjected to the heated air within the casing. lVith this arrangement. thel opposite faces ot the wel; are alternately subjected to alternate drying and rewetting):` that tace of the web passingr through the heater unit being subjected to a relatively high temperature, while the opposite tace is subjected to the cooler air outside the unit. The vapors 'Formed in 'the drying' ot' the web are recondenscd on this iace of the web, and it will he obvious that the web as a whole is suhjei'ftcfl to alternate drying and rewett-i'ng, when a plurality of heating units is used, conditions which are not conducive to the liest results.

in the present invention. the heater units faces of' the web, ,so that both `laces are Suhjected to .the same temperature, and means is provided for'withdrawing the vapors from the casing at ithe opposite laccs of the web. ln order to insure a suitable supply ol fresh preheated air and to control such supply, we enclose the battery ot heater units in an enclosing casing from which the vapors arc also withdrawn continuously,

and the incoming air is preheated by such wipers. out oll contact there-with. Each ot' the heater units coi'nprises a casing l of suitable material. and ol substantially7 rec tangular cross section` having heater units 2 arranged therein` the said units` in the present instance being eleetrically Controlled. The units are arranged in two series`r namely a series near the top ot the casing. and a series' .near the bottoni7 and any desired number ol units may be used in each series. 'l`hcunits' arel supported transversely ot the casing as shown` and the web 2l to be dried pafases between the series. t each end the casing has a slot; or opening indicated at -tY 'tor the web7 and the web is supported by endless bell' 5 during its travel through the casing. the .said belty being preferably ol iloraniinous` material. of the character shown and described in the aboyc mentioned applh cation I'or patent'. 'the ern'lless belt is supported by guide rollersl ti within the earning, and by other rollersl T out',si le the casing. in such manuel' that the upper run ol' the belt extends' loinritiuinally oll the casing in arched lormalion. 'l`he lower run passes lbeneath the casing. and counter \\`eighted tension rollerl n are arranged beneath the easing. l'or engaging the lower run ot the hell'. to tension the same. 'llhe supporting rollersl t are journaled tran. \'erf;ely el" the casing in the side wallsl thereol'. and other rollers` il and lt) are arranged nutcide oti 'the casing. and beyond the roller` T atl each end ol the casing lor guiding the web.

ily providing heaters above and below thc web both lacca Ihereot are unit-ornilr dried` and in order lo withdraw the vapor laden air.' to prevent recoinlcnnation. we arrange within the casing ol" each unit` nozzles` ll and l2. The nozzle ll is in what may be considered the upper compartment oll thev casing.that is above the web. while the nozzle l2 is in the lower,compartment` that is below the web. YThese nozzles are connected with branch pipes lll i'roin a header lllarranged at one end ol` thc battery otl units. and common to all the unitsv o'l"` the battery.

ln the bottoni ol' the heater unit casing. we`

arrange pert'oralcd pipes l5. extending hmgitndinally ot the casingnear the eide w-'lls` and the .said pipes are connected at that end adpicent tio the header ll by a. cross-pipe lt, and this pipe in turn is connected to the nozzle 12 by a pipe 17. The nozzles l1 and l2 extend substantially the 'a pipe 2T with a casing tl arranged at tl Jlull width ot' the casing, and each nozzle is connected to the adjacent branch 13, by means ot` a separating device ot the Character shown and described in application lo. #lill-,231, tiled December 3l, i920, and indicated generally at 18. rlhe separating,l derice separates the condensate from the air, the condensate being carried away by drain pipes 19, while the air passes into the branches 12% and 'from thence to the header tl. The nozzles ll and 12e and the pipes l remove the vapor laden air as fast as the yapor forms, and fresh air liows into the castings l through damper controlled openings 2t). 'To aasist in guiding the web, and

to complete the closure between the upper and lower compartan-nits. partly brought about by the passage ot' the weln flanges or ledges 2l extend inwardly .from the sido walls ot the casing, overlying' at their inner edges the adjacent edges ot the. web. ln practice that portion ot the casing,- which is above the web made separable from the lower portion, as indicated in Figure l", and the tlanges 2l are on the lower portion, the

upper portion nl the casing resting upono the flanges. lilith this arrangen'ient when access is desired to the interior ot the casing. the top portion thereof ma. be li'lited.

lre'lerably each battery ot' units, as shown in l `igure l is within an enclosing casing ol: suitable size and shape. his casing has a lalse bottom 23. and the bottom and the talee bottoni have inlet openings; Z-l and 25 Vtor air. the openings ot the l'alse bottoni being Maggered with respect to those olf the bottoni. lil'ithin the comlnirtnient termed between the false bottoni and the casing bot.- tom` there is arranged a heating coil 2o. over which the air entering the enclosing' casing must pass. The heater 26 is connected by top ot the enclosing easing and at the i adjacent to the header il. The heade` also communicates with this casing1 and web il as it enters the enclosing casing passes through thial casing 2R, As shown in Figure t3` the web passes a little below the middle ot' the casing and flanges or ledges 29 extend inwardly troni the side Valls ot the casing. to engage beneath the sid) edges ot the web. to support the saine. and to torni' with the web a closure. dividing the casing into upper and lower compartment" The header ll and the pipe 2T communicate with the lower.compartment` and a pipe 30 er@ tendsv from the upper compartment into the enclosing casing. and to 'that wall remote Afrom the header ll. llere the pipe extends outwardly alongside the end of the enclosing casing. and at Suitable intervals it is provided with nozzles 3l. These nozzles have their inlet openings adjacent to the web, and between heater units.

As Clearly shown in Figure l the Web passes into the enclosing casing 22 through the casing 28 above the topmost heater' unit of the battery,'being guided by direction elements and 33 in the form of rollers. The rollers 33 are so arranged,that the Web may pass downwardly and through the topmost heater unit. Direction elen'ients tl-l are arranged at the opposite end ot' the unit, for guiding the web'downwardly and backwardly across the enclosing casing through rollers 33, which guide the web into, the second heater unit. y This arrangement is followed throughout the battery5 the. web eventually passing 'troni the last nnitoutfthrough a passage 3er* in the'wallot' the enclosing casing, and'thispassage preferably 'has Hap valves 35 for preventing escape. o" air at the passage.

In the operation of the improied heater, as the web travels through thedeater units. the moisture is vaporized. and th vapor is withdrawn by means of the nozzles l1 and 12. Any 'vapor'in the enclosing casing is Valso withdrawn by the nozzles 31. and such vapor passes into the casing 28. From thence the vapor passes through the pipe 2T to the heater 26. Air to replace thaty withdrawn i passes upwardly through the inlets 2l and 25 beingr heated in its passage by the heater` 26. A portion ot this air passes through the damper controlled openings 20 into the casinfrs. Thus there is provided a constant circulation of air through and over the heater units, so that the vapor is carried away as it is formed, beine' replaced continuously hy fresh .dry preheated air, and the vapor laden air is utilized to heat the fresh air. ln order vto permit access to the heater units tor repairs and the like, the enclosing casing' 22 is provided with doors 556 which are hinged to the casinxgy` as indicated at il? to swingr into open or closed position. The heater units are supported in any suitable manner7 as for instance by cross-bars 3h. connected with the enclosingr casing' walls, and each unit has a supportingi t'ranic 39 which rests upon these cross-bars 33. In the forni of drier described. the opposite faces ot' the web are uniformly heated. and the evolved vapor is removed as' tast as it is formed.

lt will be understood that the hinges or ledges Q9 do not extend to the outer 'end of the' easing 2S. so that a space is provided on each side ot' the web tor permitting the vapor to pass trom above the web to below the saine.

We claim l. drier tor paper or the like. comprising' a serios ot heater units through which the. web ot' paper to be dried is drawn, each unit havingmeans tor heating the opposite 'faces otl the web. and means tor withdrawing vapor laden air troni the units.

2; ln combination with a heater unit coniprisino' a` closed casing having lncans for heating the same7 and a passage for vpermitting the web to pass through the casing. of an enclosing casing for the unit, means for withdrawing the vapor laden air from the heater casing;I and the enclosing casing, a heating coil through which said vapor laden an` is passed7 the enclosing casinghaving air inlets adjacent to which the heater is arranged.

In combination with a heater unit comprising a closed casing having means tor heating the same, and a passage for permitting the web to pass through the casing, of an enclosingr casing for the unit. the enclosing casing havinginlets for air, and means for withdrawilrar the vapor laden airv from the casingrs and t'or heating the entering air therewith.

4. A drier for paper or the like. comprisingl a series-ot` heater units through which the web of paper to be dried is drawn. each unit haring means tor heating the opposite tace ot' the web. and means 'For withdrawing Vapor laden air from the units. an enclosinir casing for the units.-said casing;` havingair' inlets.l and the withdrawing` means for the vapor laden air haring" means adjacent to the air inlets of the enclosiupr casing' for preheating' the entering` air. i

5. A drier conuirisiirc a plurality nt units, each unit comprising a source ot heat. and means engaging onel tace of the web for supporting and guiding the weh in a predetermined relation with respect to the heatingI means, said units being arranged to be engaged by the web in Succession and with the opposite faces ot' the wel) in alternation, and means in connection with each unit tor heatinfr the. face ot the web not engaged with the guiding n'ieans.

6. drier corniiirisino' a plurality ot units. each unit ctntnprising` a source ot heat. and means engaging' one tace-ot he web Yfor supporting and guiding the web in a predetermined relation with respect to the heating means, said units heine; arranged to he engaged by the web in succession and with the opposite faces or" the web in alternation, means in connection with each unit vfor heating the tace of the wel; not erng'aged with the guiding rneans, and other ieans -tor remoring the .apors they t "n.

' 7. lin a drier the character s series o*qv l eater units, means for sr and nadinea ot paper tl units in snel lesion. 'and means maintaining a circulation ot air thrt the units whereby to `facilitate the drying oit the web and to carry away the vapors.

S. In a drier of the character specilied. s. series of heater units7 an\enclosing cai-sing tor the units, means tor 'supporting and guiding' a web of paper throu-gl. the unitsin succession. and means :tor maintaining a cireination ot'air through the casinggs whereby hto facilitate the drying of the web Tand to carry away the vapors` and a heater for the entering air Controlled by the air withdrawn from the easing.

9. In a drier o',c the character specified. a easing, means for laupporting and guiding a Web of paper through the easing, nieans for Circulating air through the easing and heating means Within thev easing`r said nieans being arranged on opposite sides of the web to simultaneously heat the air at opposite faces of the web.

10. In a drier of the ebaraeter specified, a easing, nieaiis for supporting and guiding a web of paper through the easing. hating nieans within J[he easing. said iiieans being arranged on opposite sides of the web to siinultaneoiisl)v dry the opposite faces thereof, and means for ii'ithdraiiing ihe vapors ironi the easing as the)v are i'ornied.

1l. In a drier of the rhai'aeier speeiied. a easing. nieans ior supporting and guiding a \\'eb of paper through the easing. heating nieaiis within the easing. said inean being.

arranged on opposiie sides of the web te siniullaneousliY dri' they opposite iaees thereoi', and means ior maintaining;r a rireiihit'ion o' air through the easing whereby to facilitate the drying of the web and to Carry away the vapor.

l2. 1n a drying niafzhine. a Series oi drier units, eaeh eoinpriSing a 'using having nieans for guiding a web of paper or the like to be dried therethrough. ineans ior eirruhiiiiig air through the rasing oi each unit, and ineans within the easing for hea- 'ing the air.

125. in a drying n'iaehine. a drier unit coniprising a rasino through ii'hieh the `web of paper or the ii ie to be dried pasaeS, meany lor eireuhiiing air through ihe easingg and iiieans within the easing for heating the air.

14. 1n a dii'iiig niaehine. a drier unit eoniprising a easing through whieh theI web of paper or the like to be dried passes, nieans for rireuiating air through the easing` ineana ii'iihin the easing for heating the airand niean 1 nioi'ing ii'iili the web for Auppori'iiig and guiding the saine.

ln testimony whereof we aiiix our signatures. i

FhiGDERIL PYSON REED. CLARE NELSON. 

